FWIW, I think it's important to highlight that answer choice (B) refers to "some" halophytes. We don't know if that's relevant to the argument as it may, or may not be, the same subset of halophytes spoken about in the stimulus - so you can probably eliminate it just off that.

Analogous to toppled trash bin: On Friday afternoon Emily was spending time with a friend of hers who wasn't feeling well. Two days later, she came down with a cold. Surely, Emily's friend must have been the cause of the cold.

Analogous to Disney: To get a premium credit card one must either have a credit score greater than 800 or have at least $10,000 in their chequing account. Adam has a premium credit card and his credit score is 750. Therefore, Adam must have at least $10,000 in his chequing account.