If Identical Sister Chromatids Are Held Together as One Chromosome

If identical sister chromatids are held together as one chromosome in a cell, what would be the ploidy number of that cell and why?

A) The cell can be either haploid (1n) or diploid (2n) depending on the stage of the cell cycle.
B) Haploid (1n) because it still has the same number of homologous pairs of chromosomes.
C) Diploid (2n) because it still has the same number of homologous pairs of chromosomes.
D) Diploid (2n) because the number of chromosomal arms has increased.
E) Haploid (1n) because the cell is about to divide and the chromatids separate to form the genetic blueprint for each individual cell.