The word allow, in bold in the text, is closest in meaning...

Read the text and answer questions 44, 45 and 46.

Suggestion boxes

David Nunan

It may not be a high-tech device, but the suggestion box has probably done more to boost corporate efficiency over the years ________ even the most powerful computer. Suggestion boxes allow workers to recommend ways of making their jobs easier and offer employers the chance to save money - or make even more.

Listen In, Second Edition, Student Book 1, Thomson Heinle