Do you say my mom and dad's store or my mom's and dad's store

Read these lines from "an open boat" and answer the question. an open boat by alfred noyes see - quick - by that flash, where the bitter foam tosses,
 the cloud of white faces, in the black open boat,
 which of the end rhymes below matches the one in the last line of the excerpt? “he’s living, i know. but he’s numbed with the cold.” “and there are no voices or ghosts in that darkness.” “and wraps her loose hair round his breast and his throat.” “come. loosen your fingers. – o god, let me keep him! ”

Which would be the most credible source for researching the effects of smoking? letter from your grandfather web page about someone’s lung cancer report prepared by a tobacco company research article in a scientific journal

3. what is the purpose of a lead sentence or paragraph? to display your most convincing reasons and arguments to you revise the overall structure of your work to interest readers and introduce your writing style to add details and elaborate on your ideas