Which part of speech must agree standard written English

a) Subject and verb

Explanation:

In standard English, agreement refers to how a word or words undergo inflections and changes due to a change in a word that those words are dependent upon. This change is such that the sentence or statement must grammatically be correct after such a change(s).

For example:

I. 'You are' is grammatically correct. However, should the subject change from the second person to the first person, the sentence inflects to become 'I am' - it is a grammatical blunder to have 'You am' or 'I are'.

II. 'I was' is in its correct form. However, if the subject should change from the first person singular to the third person plural, the statement can be inflected to become 'they were'. It is grammatically incorrect to say 'I were' or 'they was' - such concord does not exist in standard English grammar

This change or inflection observed in examples I & II given above is because the verb form depends on the subject and any change in the subject leads to a commensurate change in the verb used.

Based on the above explanation, it becomes apparent that Option A is the correct answer

d

explanation:

it was surely an odd creature that one made up by reading the historians first and the poets afterwards a worm winged like an eagle; the spirit of life and elegance and charm,   in a kitchen chopping up suet. but these creatures, monst'r however entertaining to the imagination, hast no existence in fact. what one might doth to bringeth h'r to life wast to bethink poetically and prosaically at one and the same moment,   thus keeping in toucheth with fact—that the lady is mrs martin, ag'd thirty-six, did dress in blue, wearing a black coxcomb and brown shoeth; but not losing sight of fiction eith'r—that the lady is a vessel in which all s'rts of spirits and f'rces art coursing and flashing p'rpetually. the moment, howev'r, yond one tries this method with the elizabethan mistress, one brancheth of illumination fails; one is did hold up by the scarcity of facts.   one knoweth nothing detailed, nothing p'rfectly true and substantial about h'r.   hist'ry scarcely mentions h'r.   and i did turn to professeth'r trevelyan again to seeth what hist'ry meanteth to that gent.   i hath found by looking at his chapt'r headings yond t meanteth.