Your Uncle Bertram Is Considering Making a Will Leaving His

Your uncle Bertram is considering making a will leaving his residuary estate (worth several million pounds) to good causes to be chosen by his executors. He hates lawyers and is not prepared to take professional advice, but he has asked for your opinion about the wording of his gift. He is aware that there are inheritance tax advantages which make it advantageous to make the gift charitable.
Advise Bertram as to the most advisable form of words:

A) 'I leave my residuary estate to be distributed to such good causes as my executors shall choose.'
B) 'I leave my residuary estate to be distributed to such good and charitable causes as my executors shall choose.'
C) 'I leave my residuary estate to be distributed to such good charitable causes as my executors shall choose.'
D) 'I leave my residuary estate to be distributed to such good or worthy and charitable causes as my executors shall choose.'