” None of them was upset”
“Grammar alert” “Them is plural.”
Yes; “them” IS plural, but “none” (contraction for “no ONE”) is singular.
Read, “No one … was upset.” The “was” agrees with “one”.
“One” is the subject; “them” isn’t the subject.
Wouldn’t say, “No one … were upset.”
“Yes; “them” IS plural, but “none” (contraction for “no ONE”) is singular.”
WRONG
How many were upset? More than one! PLURAL!