Choose S for statements, Q for question, C for commands and E for exclamations:
Most of us usually lack the important virtue of patience.
a) S
b) Q
c) C
d) E

Hint: Punctuations tell a lot about the text. The above-given sentence has a full stop towards the end. From this, we can figure out the options which it cannot be. For example, it cannot be a question as a question has a question mark towards the end.

Complete answer:
The given sentence cannot be a question as questions are interrogatory and begin with one of the following: Who, Why, What, When, or How, and end with a punctuation called question mark (?) , which is not the case here. Therefore option b is incorrect.
It cannot be an exclamatory sentence either as exclamatory sentences express intense emotion like a surprise (Wow!), sadness (alas!), etc., and end with an exclamation mark (!), which is not the case here. For example, “Wow! what a gorgeous view it is!” Thus, option d is incorrect too.
It is not a command because commands are a type of sentence in which someone is being told to do something by another person, more like an action demanded to be done, which is not the case here. For example, “The officer commanded that all the soldiers present at the camp must move towards the forest exit.” So, option c is incorrect too.
The given sentence is a statement, and that is the only option left. Statements are sentences that express an idea, fact, or opinion, truth, etc. For example, “The weather is cold in the mountains.” Thus, option a ‘S’ is the correct answer.

Note:
The sentence expresses an opinion of the speaker about most of the people in general, which makes it a generic statement that comes from the perspective of the speaker. Both command and statement end with a full stop but this cannot be a command as commands tell someone to do something, it’s more like an order.