Which subordinating conjunction correctly completes this sentence?

Mandy failed to beat her final opponent, _____ she practiced karate every day.

A.
though
B.
that
C.
if
D.
whereWhich subordinating conjunction correctly completes this sentence?

Mandy failed to beat her final opponent, _____ she practiced karate every day.

A.
though
B.
that
C.
if
D.
where