3.Archaeologists have found wheeled ceramic toys made by the Toltec， twelfth-century inhabitants of what is now Veracruz. Although there is no archaeological evidence that the Toltec used wheels for anything but toys， some anthropologists hypothesize that wheeled utility vehicles were used to carry materials needed for the monumental structures the Toltec produced.Which of the following， if true， would most help the anthropologists explain the lack of evidence noted above？

　　（A） The Toltec sometimes incorporated into their toys representations of utensils or other devices that served some practical purpose.

　　（B） Any wheeled utility vehicles used by the Toltec could have been made entirely of wood， and unlike ceramic， wood decays rapidly in the humid climate of Veracruz.

　　（C） Carvings in monument walls suggest that the Toltec's wheeled ceramic toys somtimes had ritual uses in addition to being used by both children and adults as decorations and playthings.

　　（D） Wheeled utility vehicles were used during the twelfth century in many areas of the world， but during this time wheeled toys were not very common in areas outside Veracruz.

　　（E） Some of the wheeled ceramic toys were found near the remains of monumental stuctures.

　　4.A severe drought can actually lessen the total amount of government aid that United States farmers receive as a group. The government pays farmers the amount，if any， by which the market price at which crops are actually sold falls short of a preset target price per bushel for the crops. The drought of 1983， for example， caused farm-program payments to drop by $10 billion.

　　Given the information above， which of the following， if true， best explains why the drought of 1983 resulted in a reduction in farm-program payments？

　　（A） Prior to the drought of 1983， the government raised the target price for crops in order to aid farmers in reducing their debt loads.

　　（B） Due to the drought of 1983， United States farmers exported less food in 1983 than in the preceding year.

　　（C） Due to the drought of 1983， United States farmers had smaller harvests and thus received a higher market price for the 1983 crop than for the larger crop of the preceding year.

　　（D） Due to the drought of 1983 ， United States farmers planned to plant smaller crops in 1984 than they had in 1983.

　　（E） Despite the drought of 1983， retail prices for food did not increase significantly between 1982 and 1983.