Humanities Homework Help

 Select the letter of the term that identifies the phrase in

    parentheses in the following sentence:  Biochemists (working at the

    International Potato Center) have engineered a higher protein

    potato that may become a valuable new protein source for people in

    developing countries.

    a. prepositional phrase

    b. appositive phrase

    c. participial phrase

    d. gerund phrase

    e. infinitive phrase