Answer:
Thy lips are like a thread of scarlet
The answer is B. Tan is presenting the example <em>"limited English"</em>, which is just <em>one of many</em> other terms she heard before, to express how bad they seem. Because, when people deem those whose knowledge of the Mother Tongue <em>is not as the native speaker</em>, therefore is limited, they are defining everything as limited, even their speaking perceptions.
Two sikers is the two words that complete subject