The domain of discourse are the students in a class. Define the predicates:
S(x): x studied for the test
A(x): x received an A on the test
Select the logical expression that is equivalent to:
"Everyone who studied for the test received an A on the test."
a. ∀x ((x)→(x))
b. ∀x ((x)→(x))
c. ∀x ((x)∧(x))
d. ∀x ((x)↔(x))