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(a) Not to Give Donation to any person or organisation. All are thieves. (b) Tell the reason for saving donation. (c) To provide your voluntary service to Not-for-profit organisation on the basis of your skills, knowledge and experience. (d) Fight who demand the donation
if having a limited salary, then: (c) To provide your voluntary service to Not-for-profit organisation on the basis of your skills, knowledge and experience. as it will not require any disbursement
For the reason mention in this question the proper answer is option C
(c) To provide your voluntary service to Not-for-profit organisation on the basis of your skills, knowledge and experience.
In the given options I prefer the option (C). Even I opted for the option (c), I have the opinion that sometimes in some cases, instead of voluntary services, a donation in kind (eg, in terms of money, dress or dress materials, foodstuffs etc) is mandatory and can't get away from it according to the circumstance. Not to give any donations to profit organizations.
For a person with limited means to go about a living option C is the best. Even then a tiny bit given to a "genuine" charity won't hurt.