Which one of the following illustrates positive transfer? A. Vince notices that rules of…

Which one of the following illustrates positive transfer?
A.
Vince notices that rules of grammar are not always the same in English and Japanese.
B.
Robert is trying to learn the spelling of the word shepherd. He remembers that he learned to spell tomcat by putting two words together and so writes “sheepherd.”
C.
Zelda uses the formula for calculating the area of a circle when she wants to know how much bigger a 10-inch pizza is than a 7-inch pizza.
D.
David is trying to learn to program a computer. He reads his programming manual but is confused by some of its instructions.