William Shakespeare's sonnets deal with a variety of themes. Sonnet 116 in particular revolves around the steadfastness of love, option A. The constancy of love is alluded in several words used in the sonnet: "an ever-fixed mark" and "never shaken" for instance serve the purpose of reinforcing the concept of steadfastness.
The answer is A. the whole beginning of the poem is saying Love does not seek to change what it doesn't like, it finds a way to love through it. The poem then moves to the theme of love does not diminish over time
