Each of them was also given a metal stick, with four prongs on one end.

“Fork,” the sailor said – and showed them they should use it to eat the rice.

The fishermen recited their prayer before eating. “Itadakimasu – I will humbly receive.”

Then Goemon said, “It might be poison.”

What can readers infer based on details in the excerpt?

Goemon likes new experiences.
Goemon is not afraid of his rescuers.
Goemon does not trust his rescuers.
Goemon has used a fork before.

Based on the details in the excerpt, readers can infer that Goemon does not trust his rescuers. This is apparent when he says, "It might be poison."