Which of These Would Be a Trespass

Which of these would be a trespass?

A) A postman going through a gate and walking onto someone's property to deliver mail
B) Branches from a neighbour's tree overhang into a homeowner's garden and make it difficult to access the shed
C) A man steps on a homeowner's land after being pushed by his wife
D) A woman leaves her bicycle against the wall of someone's house while she pops into the shop next door