As he shook my hand, his coat fell open to expose a bright red satin shirt with a beaded bolo tie under the collar. His get-up wasn’t out of place on the reservation, but it sure was here, and I wanted to sink right through the pavement. “Hi,” I muttered with my head down. I tried to pull my hand away when I felt his bony hand trembling, and looked up to see fatigue in his face. I felt like crying. I couldn’t think of anything to say so I picked up Grandpa’s suitcase, took his arm, and guided him up the driveway to our house.

Which detail from the text best supports the claim that Grandpa’s surprise visit creates a conflict for Martin?

Martin looks up and sees fatigue in Grandpa’s face.
Martin puts his head down and tries to pull away his hand.
Martin shakes Grandpa’s hand and says hi.
Martin picks up Grandpa’s suitcase and guides him up the driveway.