It's B
That's the only one up there with both.
Cephalopods have a closed circulatory system where blood is transported through vessels. However, most other mollusks have an open circulatory system where blood is not always in vessels, but is spread over the organs.
When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus. The distance between the principal focus and the centre of the lens is called the focal length.
