IX. Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions.
My dad had a wide range of practical life skills. He could solve most problems by himself.
A.If my dad hadn't had a wide range of practical life skills, he couldn't have solved most problems by himself.
B.Because my dad hadn't had a wide range of practical life skills, he couldn't have solved most problems by himself.
C.Since my dad didn't have a wide range of practical life skills, he couldn't solve most problems by himself.
D.If my dad had a wide range of practical life skills, he couldn't solve most problems by himself.