In "only daughter," which passage is an example of irony?

a. being an only daughter in a family of six sons forced me by circumstance to spend a lot of time by myself because my brother felt it beneath them to play with a girl in public.
b. i went upstairs to my father's room. one of my stories had just been translated into spanish and published in an anthology of chicano writing and i wanted to show it to him.
c. in retrospect, i'm lucky my father believed daughters were meant for husbands. it meant it didn't matter if i majored in something silly like english.
d. we'd have to let go of our flat, store the furniture with mother's relatives, load the station wagon with baggage and bologna sandwiches and head south. to mexico city.

Read this passage: many manufacturers prefer plastic as a material for containers because it can be molded into many shapes. but plastic is not very strong. it must be fused with glass or steel for strength. it is also not very durable. even the strongest plastic can break under enough pressure. the biggest disadvantage to using plastic is that it does not decompose. while plastic can be recycled, doing so is tedious and difficult. while it may be more expensive and difficult to work with, aluminum is a much stronger building material with far greater tensile strength. it conducts electricity because it is metal. best of all, aluminum is very easy to recycle. even if it is thrown away, it decomposes much more quickly than most manufacturing materials. how does the compare-and-contrast organizational pattern of the passage support the author's purpose? a. the passage gradually leads up to the point about decomposition to inform the reader about the importance of recycling plastics. b. the passage lists the advantages and disadvantages of each material to make a case for the use of plastic and not aluminum in containers. c. the passage begins with a description of plastic's problems in order to call attention to the good qualities of aluminum. d. the passage shows the superiority of aluminum in order to make a case for the production of stronger plastics.