Questão de Língua Inglesa

Which is the correct option to complete the text below? Chock-a-block Today, this adjective means ‘crammed full with people or things’ (the narrow roads are chock-a-block with vehicles). Chock derives ______ chock-full, a Middle English word ______ unknown origin meaning ‘very full’. It rhymes nicely ______ the block in question, more fully known as a pulley block, part ______ a block and tackle. This is a device much used ______ boats and elsewhere to make lifting heavy weights less demanding. (https://blog.oxforddictionaries.com)