In spite of his old age, Mr. Wilson swims in the pool every morning.
A.Although Mr.WIlson is old age, he swims in the pool every morning.
B.Although Mr.WIlson is old, he swims in the pool every morning.
C.Although Mr.WIlson is young, he swims in the pool every morning.
D.Although Mr.WIlson is old, he will swims in the pool every morning.