Question

Select the two items that are TRUE.

A fief is the troop of knights granted to the vassal.
King John of England was a vassal himself who refused some of the rulings of Philip and war broke out between the factions.
Subinfeudation is a layering of responsibility.

Answer 1

The true items from the list you've provided would be that a fief is the troop of knights granted t othe vassal - and this was a rather common occurence in the medieval time.

The other true items would be that King John of England was a vassal himself who refused some of the rulings of Philip and for that reason, there was war between the two factions.

Answer 2

The following items that are True.
(1) A fief is the troop of knights granted to the vassal.
(2) King John of England was a vassal himself who refused some of the rulings of Philip and war broke out between the factions.

Subinfeudation is a layering of responsibility. It might be look true but subinfeudation refers to a sublease portion of a vassal.