Answer:
D. she thinks he is lonely
Step-by-step explanation:
She doesn't need help to get across the stream every time and she is already a old lady while Sam has only be there once so A can't be it. In the question it says that she insist on walking him "home" therefore it cannot be B and she doesn't want to show him where to find the falcons, therefore, your only answer would be D. she thinks he is lonely.