Which of the sentences in the selection uses INCORRECT subject/verb agreement?
a)1 [1] "Of who—of what is you thinking?" asked Adele of her companion, whose countenance she had been watching with a little amused attention, arrested by the absorbed expression which seemed to have seized and fixed every feature into a statuesque repose.
b)2 [2] "Nothing," returned Mrs. Pontellier, with a start, adding at once: "How stupid! But it seems to me it is the reply we make instinctively to such a question
c)5 [5] "Oh! never mind!" laughed Madame Ratignolle.
d)3 [3]Let me see," she went on, throwing back her head and narrowing her fine eyes till they shone like two vivid points of light.
