SAT writing question

Test Preparation SAT Preparation
1

The root system of the marsh-loving purple loosestrife (Lythrum salicaria) is tenacious,
(A) making this invasive plant species difficult to be controlled.
(B) making this invasive plant species difficult to control

which is the correct answer? Thanks in advance

2

B, it’s simpler and more direct.

3

“to be controlled” is passive, and since there’s an active voice version available, it’s the superior choice.