To accurately determine what the underlined sentence suggests about Framton's character, it would be helpful to know the context of the sentence within the excerpt. However, based solely on the provided response options and general understanding of characters like Framton Nuttel from Saki's "The Open Window," the first option, "It suggests that Framton lacks courage in new situations," is often a common interpretation of his character, as he is depicted as nervous and anxious in unfamiliar environments.
If you can provide the actual underlined sentence, I can give a more precise analysis.