Choose the correct word to complete the food critic's dramatic review of a dangerous dish.

A master chef can, and arguably _____, prepare the venomous fugu fish without endangering the guests.

The correct answer is should.

This is a tricky type of ellipsis called Right-Node Raising. Because both modal verbs ("can" and "should") share the exact same main verb phrase ("prepare the venomous fugu fish..."), we can delay the main verb until the very end.

If you chose "should prepare," the sentence would ungrammatically repeat the verb: "...arguably should prepare, prepare the venomous fugu fish..."