Answer: C. They show the speaker's feelings and behaviour at the start of her marriage, when she was young and less mature.
The poem "The River Merchant's Wife: A Letter" by Ezra Pound describes the transformation that a young girl undergoes when she finds a partner. At the beginning of the poem, the girl describes how she was timid, and how she kept her head down. However, as time goes by, she becomes more comfortable with her partner, eventually missing him terribly when he is away. The line describes the first stage of this relationship, when her shyness prevented her from being herself.
No improvement to this sentence is necessary. It makes perfect sense on its own and sounds right. "Either" always takes an "or" else the word wouldn't make sense, as it's meant to contrast binary options.
eg.
I'm either going to eat food or drink water.
The best thing to do is to use transitions. But you did not give any of the following
My grandma loves trying to cultivate her amazing dream garden :) does that work