The reason is becuase at the beginning she is nervous about being paired it shows up right at the beginning when she says "My biggest fear that she would be signed up for the 10 mile Hike and the whole time scoffing at our inferior endurance." For the second part you don't need to think that hard becuase it easy to combined them and see that the 3rd option makes the most sense.
The answer is A. as portia is trying to convince brutus to tell her about the conspirators that have been visiting brutus and abiut why he was acting strangely lately
