Question

She carried a lunch box so________ she could eat on the train. Choose the option that best fills in the blank:
A) for
B) when
C) than
D) that

Answer 1

Hint: A conjunction blends two sentences as one, or connects them. The conjunction is either subordinated or organised, depending on the relationship between these parts of the resulting sentence.

Complete answer:
In the sentence given, the "she may eat on the train" clause is subordinate/dependent, since it depends for its full sense on the main/independent clause "She carried a lunch box," so we use subordinate conjunction.
When both clauses are separate, coordinating conjunction is used. Either a single word or a phrase may be conjunction, as of, as if, as much as, so that, etc. The conjunction in this sentence is a phrase from which the first word "so" is given and we need to find the second part of the phrase from the choices. "The subordinate clause is the object behind which the action takes place in the main clause" carried a lunch box, "aimed at'' eating on the train.
From the choices,' that' expresses intent when paired together, (so that) the phrase refers to a purpose, hence option D is correct.
For 'is a coordinating conjunction, it is an Illative conjunction, which means' inferred from 'and is used when the other provides one statement or fact, while the sentence is given is not based on inference, so choice A is incorrect. For time-related sentences,' When' is used, but the given sentence does not concentrate on time, so choice B is incorrect. In contrast, in sentences, when two persons or objects are compared, 'Than' is used. The word, which is not a comparison, makes option C wrong.

Hence the correct answer is option ‘D’.

Note: Coordinating conjunctions allow you to join words, phrases, and clauses of equal grammatical rank in a sentence. The most common coordinating conjunctions are for, and, nor, but, or, yet, and so; you can remember them by using the mnemonic device FANBOYS.