Ballard did not know exactly where the Titanic's wreck was located. How did he overcome this problem?

Explanation:

Dr. Robert Ballard was an oceanographer (one who studies the ocean), he dreams to find the wreckage of the lost Titanic ship came with great challenges which included research funding and permission from the government to carry out the search.

To overcome this challenge, over the years Ballard had to learn new wreckage searching techniques as well as learning/designing advance underwater sea equipment such as Argo, an unmanned device that was equipped with cameras that provided live video feeds of the seafloor. After a diligent search for a second time, Ballard and his team overcame the problem and to his delight found the titanic.  

i used to know but i learned it a long time ago sorry

explanation:

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.