Suppose $1 Billion Is Available in the Budget and Congress

Suppose $1 billion is available in the budget and Congress is considering allocating the funds to one of the following three alternatives:
A.subsidies for education
B.research on Alzheimer's
C.increased border security
If voters prefer a to b and b to c, then if preferences are transitive

A) they should prefer a to c.
B) they should prefer c to a.
C) they should be indifferent between a and c.
D) it is not always possible to rank voters' preferences between a and c.