Select the grammatically correct statement from among the given options.
A. It is a nice party. I am enjoying the party.
B. It is a party. I am enjoying an party.
C. It is party. I am enjoying a party.
D. It is the party. I am enjoying an party.

Correct option is D

The grammatically correct statement is option (d): "It is a nice party. I am enjoying the party."
 In this option, the article "a" is used correctly before the noun "party," making it "a party," which is the correct indefinite article to use when referring to a party in a general sense.
 The sentence structure is correct, with a subject ("I") and a verb ("am enjoying") followed by the object ("the party").