Please answer

Compared to a solution with a pH of 2, a solution with a pH of 1 is
A. An acid 10 times stronger
B. A base 10 times stronger
C. An acid 1/10th as strong
D. A base, 1/10th as strong

Which substance is a strong base?
A. Vinegar B. Soap
C. lemon juice
D. Drano/Liquid Plu