The adjectives - empty, excellent, circular, extreme, chief, entire, complete, perfect, final, last, unique, universal, round, square, triangular, eternal, etc. are not used in the comparative or superlative degree.
So, using 'most' and 'more' before 'universal' is incorrect. So, the highlighted phrase requires replacement.
'Universal' starts with a vowel but is a consonant-sounding word. So, it shall be preceded by 'a', and not 'an'.
The correct sentence is: Cinema provides a universal entertainment.
Hence, option (c) is the answer.
Note: · The Positive Degree is used to denote the mere existence of some quality of what we speak about. It is used when no comparison is made.
· The Comparative degree denotes a higher degree of quality than the positive and is used when two things are compared.
· The Superlative degree indicates the highest degree of quality and is used when more than two things (or sets of things) are compared.