Which of the Following Is an Instance of Proactive Interference

Which of the following is an instance of proactive interference?

A) You learned French in high school and now you confuse French words with new words you are learning in your Spanish class.
B) You find that after completing a computer programming course in C++ this semester, you cannot remember the Visual Basic commands that you learned last year.
C) You have trouble recalling the names of your grade school classmates.
D) You find that the course you took in Western Civilization last semester is helping you understand the work that you are reading for your Comparative Literature course this semester.