Vicki and Tamra are working on their math homework together. Vicki has worked p problems, and Tamra has worked 3 times as many problems as Vicki. The expression shows how many problems they have worked altogether.

Which of the following is another expression that could be used to get the same result, and what does it represent?
A.
4p. This represents that Vicky and Tamra have worked on 4p problems altogether.
B.
p + 3. This represents that Vicky and Tamra have worked on p + 3 problems altogether.
C.
4p2. This represents that Vicky and Tamra have worked on 4p2 problems altogether.
D.
p + 4. This represents that Vicky and Tamra have worked on p + 4 problems altogether.