The contraction is " I'd ".
It's the contraction of " I would ", and rhymes with "wide".
Explanation:
Well technology is far more advanced than what we had decades ago. so it takes a simple lab test to see what you affected by. And also we have had more time to study what each allergy does and what symptoms may be involved in it
B is correct "A social commentator, who explains what a book says about people in general."