David Finkel's article The Return, which appeared in the magazine The New Yorker, told the story of traumatized veterans who returned to civilian life from wars in Iraq and Afghanistan.

The Return
The New Yorker
Iraq and Afghanistan
No error

the correct answer is d.   to change the pace

explanation:

consonant blends (also called consonant clusters) are groups of two or three consonants in words that makes a distinct consonant sound, such as "bl" or "spl." consonant digraphs include bl, br, ch, ck, cl, cr, dr, fl, fr, gh, gl, gr, ng, ph, pl, pr, qu, sc, sh, sk, sl, sm, sn, sp, st, sw, th, tr, tw, wh, wr.