Answer: Option(c) Richard Lester is correct.
Explanation:
Both the films were directed by Richard Lester.
A Hard Day's night was a scripted comic farce and its main focus on Beatlemania and the band's hectic touring lifestyle. It is a black and white movie.
Help! film also directed by Richard Lester. And this film was shot in various exotic locations. Help! was the first Beatles film that is filmed in colour.