The OP field in the NiosII instructions uses 6 bits of the instruction. How many instructions could this make directly available?A16B32C64D128SUBMIT

The number of instructions that can be represented is determined by the number of bits in the OP field. Each bit can be either a 0 or a 1, so 2 options. If there are 6 bits, then the number of possible combinations of those bits is 2^6.

Step 1: Identify the number of bits, which is 6 in this case. Step 2: Since each bit can be either a 0 or 1, calculate the number of possible combinations using the formula 2^n, where n is the number of bits. Step 3: Calculate 2^6 = 64.

So, the OP field in the NiosII instructions could directly make 64 instructions available. Therefore, the answer is C64.