When Reasoning About Conditional Statements, People

When reasoning about conditional statements, people:

A) often have difficulty with statements that follow the rule of modus ponens
B) often have difficulty with statements that follow the rule of modus tollens
C) tend to have equal difficulty with statements that follow the rule of modus ponens and those that follow the rule of modus tollens
D) tend to be able to reason correctly with complex statements that follow the rule of modus ponens and also with those that follow the rule of modus tollens