The correct option is "many". The word "many" is used to refer to a large number of countable objects, such as "flowers".
The sentence becomes:
The petals of many flowers expand in the sunshine.
The correct option is "many".
Each question has a sentence that has an underlined part. Choose the option which rephrases the underlined part in the most appropriate manner in terms of grammar and usage.
In an attempt to boost their profits, many edible oil-producing companies have been engaging themselves in propaganda against commonly used oils and promoting exotic and expensive varieties of oils \(\underline{as\ more\ healthier\ options.} \)