A. Transportation planner Sarah Reidel believes that companies need to encourage employees to take alternate means of transportation, telecommute when possible, and work abbreviated schedules.
Parallel structure is when there is a consistent use of the same grammatical structure. This is especially important when writing a list. In the sentence, the author lists the three things companies can do to help with the transportation problem. The verb structure needs to be the same. Option A is the only choice that has a similar verb structure for encourage, telecommute and work. Other options vary the verb structure sometimes using verbs that end in -ing while others do not. These do not have parallel structure.
B, handwritten letters, because the letters are probably the most credible, especially since they're a first-hand account of things that happened to your ancestors, and as WorldlyGlass45 mentioned in their answer to this question on another post, you'll most likely get the most info from the letters as well.
Answer:
not known or recognized.
"his voice was unfamiliar to her"
synonyms:
unknown · new · strange · queer · foreign · alien · unheard of · beyond someone's ken
unusual or uncharacteristic.
"the yellow taxicab was an unfamiliar sight on these roads"
synonyms:
unusual · uncommon · unconventional · novel · different · exotic · alternative · unorthodox · odd · peculiar · curious · atypical · uncharacteristic · unwonted · abnormal · anomalous · aberrant · out of the ordinary
(unfamiliar with)
not having knowledge or experience of.
"the organization was set up to advise people who might be unfamiliar with legal procedures"
synonyms:
unacquainted with · unused to · unaccustomed to · unconversant with · unpracticed in · inexperienced in · unskilled in · unversed in · uninformed about ·
If I am correct your answer is “ Indifferent to their mothers affection”
