Which is the best method to load data from the MARKS_DETAILStable to the MARKStable?

View the Exhibit and examine the structure of the MARKS_DETAILS and MARKStables.
Which is the best method to load data from the MARKS_DETAILStable to the MARKStable?

A.
Pivoting INSERT

B.
Unconditional INSERT

C.
Conditional ALL INSERT

D.
Conditional FIRST INSERT