Answer from cs61c-eq (Nicholas Hwang 16732453) for Question 2
C has:
if-else
for
while
do-while
switch
? operator

MIPS has:
bne
beq
slt

The lack of more elaborate decision makers is to make the interface simpler for the hardware to run. Since every other decision maker can be composed of these basic elements, there is no need to make the system any more complicated than this.