Which of the following is a major mechanism whereby hormones ...

[xclash]

Which of the following is a major mechanism whereby hormones control plant development?
A) cell respiration via regulation of the citric acid cycle
B) cell division via the cell cycle
C) cell elongation through production of cellulase
D) cell differentiation through altered spliceosome activity
E) cell synthesis of proteins via altered gene expression

[clippers!]

I chose B and got the answer, hope that helps.