How to tell what a noun clause sentence looks like

Lens quotation: "character is what you are in the dark." -dwight lyman moody

Aprimary source: a- may be biased b- is never biased c- cannot possibly have bias d- none of the above

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.