Definition: In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.
Input: Question: How large was the Merchant Navy during the year that R.S. Thomas moved to Holyhead? Passage:R. S. Thomas was born in Cardiff, the only child of Thomas Hubert and Margaret (nee Davies). The family moved to Holyhead in 1918 because of his father's work in the Merchant Navy. He was awarded a bursary in 1932 to study at the University College of North Wales, where he read Latin. In 1936, after he completed his theological training at St. Michael's College, Llandaff, he was ordained as a priest in the Anglican Church in Wales. From 1936 to 1940 he was the curate of Chirk, Denbighshire, where he met his future wife, Mildred "Elsi" Eldridge, an English artist. He subsequently became curate-in charge of Tallarn Green, Flintshire, as part of his duties as curate of Hanmer.
Links: a. Chirk b. Holyhead c. Chirk d. Merchant navy
Output:
d