The correct answers are A and B. They refer to setting up a home, that is becoming mature so as to create your own home. The other choices simply do not reflect an idea of becoming independent or maturing in any other way.
The two lines in this excerpt from John Keat's "Ode to Autumn" that reflect the theme of growth and maturation are, A. To bend with apples the moss'd cottage-trees, and B. To swell the gourd, and plump the hazel shells.
These two sentences are giving examples of this that go through a prosses of full competition. which can be a synonym of growth or maturation, we can see this in the way fruit is described and how the grains go to a point of harvesting.
The other options don have any word that could be taken as a synonym or relative word to growth or maturation.
Nixon was defending himself at a press conference in Orlando by saying "im not a crook" not only against Watergate but for unpaid income taxes. He meant to restorepublic faith but it backfired.
