Why were so few dates available to the allies for the d-day invasion

The D-Day invasion was the biggest amphibious invasion of all time. It was extremely hard to plan and even harder to accomplish. Every single detail had to be near perfect for it to succeed. That meant the weather and the sea needed to be in excellent condition. We see this invasion as something relatively easy and a logical move today, but in reality, it was very hard to do.

answer; /// the above statement is (false); the smaller states objected to the virginia plan because they would have fewer votes that the larger states;