The advantages of haploids in crop improvement include:

A. Haploids are useful for induction of mutations and mutation breeding

B. In hybridisation, the haploids combine the advantages of recombination, segregation and fixation

C. Use of haploids in the production of homozygous pureline by doubling of chromosomes reduces the total time for developing a new variety from 10 years to 5 to 6 years

D. All of the above

Answer: Option D