What was Mendel referring to when he wrote that "the hybrid character resembles that of one of the parental forms so closely that the other either escapes observation completely or cannot be detected with certainly" ?

It means that one either exactly resembles a parent or it does not.  

Explanation:

integrated circuit (ic) is defined as a set of electronic circuits on one small flat piece of semiconductor material, normally silicon. a functional electronic circuit requires transistors, resistors, capacitors, inductors, etc., and the connections between them.

the answer is d. exposing corruption in the church