1-Methylcyclopentene can be converted into the given compound
by the use of which of the followign reagetns?
A. `BD_(3)` followed by `HCOOH`
B. `BH_(3)` followed HCOOD
C. `BD_(3)` followed by HCOOD
D. `BH_(3)` followed by `CH_(3)-overset(O)overset(||)(C)-O-D`