Why is it necessary to use separate reactions for each type of ddNTP in dideoxy sequencing?

• A. To accurately determine the sequence by generating fragments of varying lengths
• B. To ensure that the DNA polymerase can distinguish between different nucleotides
• C. To increase the overall reaction speed by running all ddNTPs together
• D. To simplify the process of mixing ddNTPs with fluorescent dyes

Answer: (A)