Arthur melin and Richard knerr, developers of the hula hoop based ___ idea on bamboo hoops used in Australian gym glasses
Identify the choice that correctly completes sentence
O they're
O there
O his
O their
The correct choice that completes the sentence is "their".
To identify the correct choice, we need to understand the subject of the sentence. The subject of the sentence is "Arthur Melin and Richard Knerr, developers of the hula hoop". Since there are two developers, we need a pronoun that indicates possession by multiple people. The pronoun "their" is the plural possessive form of "they". Therefore, the correct choice is "their".