Prototypes or pilots allow the designers to test and ..... the ability of the product or service to perform as originally expected.

English as a Second Language Single question discussions
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Prototypes or pilots allow the designers to test and ..... the ability of the product or service to perform as originally expected. (*) approve (*) guarantee (*) satisfy (*) verify

This is a companion discussion topic for the original entry at https://english.best/questions/7118,prototypes-or-pilots-allow-the-designers-to-test-and-___-the-ability-of-the-product-or-service-to-perform-as-originally-expected/