[مدحت الزرزموني]

أنا أرى أن كلاً من both / none) هي اختيارات صحيحة
والدليل من كتاب
English Grammar in Use
A self-study reference and practice book for intermediate students
Raymond Murphy
Second Edition
CAMBRIDGE UNIVERSITY PRESS


وهذا هو الدليل

After none of + a plural word ('none of the shops', 'none of them' etc.) you
can use a singular or a plural verb. A plural verb is more usual:
* None of the shops were (or was) open.