Which of the following forms of tetrahydrofolate is correctly paired with the reaction for which it serves as a coenzyme?

A)5,10-methenyl-THF: biosynthesis of purines
B)5-methyl-THF: dUMP $\to$ dTMP
C)5,10-methylene-THF: glycine $\to$ serine
D)5-methyl-THF: methionine $\to$ homocysteine
E)all of the above