What it is: The pricing rule and the special “no charge” behavior when S3TA won’t accelerate.

Key rule (quote-level idea, paraphrased):

• Each accelerated upload is evaluated; if it’s not likely faster, no S3TA charge is applied for that transfer, and S3TA may be bypassed.

What you still pay (common exam trap):

• Even if “transfer charges” are $0 in that scenario, you can still pay:
  • S3 request cost (PUT)
  • S3 storage cost (storing 3 GB)
• (This question asked only about transfer charges.)

Hard words:

• *determine* /dɪˈtɝːmɪn/: xác định
• *likely* /ˈlaɪkli/: có khả năng
• *transfer charge* /ˈtrænsfɚ tʃɑːrdʒ/: phí truyền dữ liệu