Some federal grants, such as categorical grants, ____________, while others, such as block grants, ____________.
a. are for social welfare projects; are for maintenance of infrastructure
b. fund specific programs or projects; give states greater flexibility in spending
c. fund only individual citizens; fund only projects for states and localities
d. fund projects in broad categories; impede states' abilities to spend as they wish
e. permit only government officials to spend funds; allow the public at large to guide funding