Which pronoun best completes the sentence? How is the pronoun used?

Mom and Dad talked to my sister and .

me; object of a preposition

me; direct object

I; direct object

I; object of a preposition

Desalination is expensive because it requires

Aspy novel would probably be a novel of

Which sentence is punctuated correctly?  a.under a microscope; the organisms look a bit like ruffled tennis balls they have armored plates that fit together to make a round shape. b.when the water is disturbed; the organisms respond by glowing this makes swimmers look like floating beams of blue light. c.there is a bay in puerto rico that seems to light up at night; the light comes from tiny organisms in the water. d.the luminescence attracts visitors from around the world people are curious to see; this beautiful otherworldly sight.