Question

at the end of prophase, spindle fibers form among the chromosomes, and the kinetochore of each chromatid becomes attached to which specific structure, formed by a spindle fiber? answer a centriole a microfilament a chromosomal microtubule a centromere i dont know yet

Explanation:

During mitosis, at the end of prophase, spindle fibers (composed of microtubules) form. The kinetochore of each chromatid attaches to chromosomal microtubules (a type of spindle fiber - derived structure). Centrioles organize spindle fibers, microfilaments are for cell movement/structure, and centromeres are the chromatid - joining region, not the attachment structure here.

Answer:

C. A chromosomal microtubule