B or C. Hypothesis being an estimated gas before starting and experiment . I’m sorry
Answer:a. A cataract is a clouding of the lens. Some cataracts are congenital, but most are due to age-related hardening and thickening of the lens, diabetes mellitus, or exposure to UV rays over time. The lens can be removed and replaced
with an artificial lens.
Explanation:
Francis Crick discovered the DNA structure.
