How long is any replacement software product warranted for?

Replacement software products are usually warranted for a specific time period, known as the warranty period. This may vary depending on the manufacturer, but it typically ranges from 30-90 days. Option D offers the most comprehensive warranty as it covers the remainder of the original warranty period, which could be longer than 30 days, or a full 30 days if the original warranty period has expired. This is why option D is the correct answer. Options A, B, and C may only cover a specific time period and may not take into account the remaining warranty period of the original product.