The light bulb was an invention. It brought electricity into homes.
that who joining words
which
Combine the sentences into one sentence. Use one of the joining words.

since it is asking for her reaction to elnora's trouble at school you can rule out any answers with a positive response (b). then you can rule out (d), this is because it does not show the mother's reaction but the daughter's response. that leaves you with two options (a) and (c), by looking at the options you can rule out (c) because it isn't referring back to elnora's issues at school.

the father traits is what becomes more dominate the mothers is half dominate or vise versa depending on the gender.