Comment suggestions if you have any!

A: Only one that uses implicit differentiation, only one where point is given (not just x coordinate)

B- Only one asking for general derivative, not derivative at a point

C- Only one that requires product rule, only one not in terms of y (in function notation with g(x)), only one with trig function

D- Only one that does not equal 1/2 (equals -1/2), only one from a table, only one that requires quotient rule