Final answer:
When four phrases are put together in a poem, it's often called a quatrain, which can follow various rhyme schemes; 'common meter' is a specific type of quatrain with a traditional ABAB rhyme scheme.Option c is the correct
Step-by-step explanation:
When four phrases are put together in a poem, the result is commonly known as a quatrain. This structure is a standard verse form used in English poetry, comprising four lines with various possible rhyme schemes.
Some examples include AABB, ABBA, AABA, and ABCB. The term common meter refers to a specific type of quatrain used traditionally in hymns and ballads, consisting of alternating lines of iambic tetrameter and iambic trimeter, commonly following an ABAB rhyme scheme.
Therefore, the common structure used as a standard when four phrases are put together is known as a "common meter", .