I apologize for any confusion in my previous responses. The main benefit of relocating Charles Town to Oyster Point is primarily about access to the river, which was essential for transportation and trade, but it also offered improved access to the ocean for broader maritime activities.
So, while A access to the river is an accurate description of a significant benefit, D access to the ocean can also be considered a valid aspect of why the relocation was advantageous, given the strategic importance of both waterways.
If you need a single best answer, A access to the river is often cited as the key factor influencing the relocation. If the context of your question emphasizes broader maritime access, then D access to the ocean could also be appropriate depending on the specific circumstances being referenced.
Please let me know if there's a particular context or source you are referring to, and I'll do my best to clarify!