The correct option is D They speak to the need for responsible family planning and financial preparation.
The passage lists the reasons for the high cost of raising a child from birth till seventeen years of age. These reasons do not serve the purpose of being a deterrent. The tone of the passage is one of caution and is formal. Options A, B and D are incorrect as they do not fit the tone of the passage- they seem too informal. Option C fits into this context and is the answer.