How Would Shoot and Root Growth Be Affected by a Mutation

How would shoot and root growth be affected by a mutation that caused plants to lose the ability to polymerize glucose into starch granules?

A) Lateral branch shoots would grow more upright, and be less able to maintain a horizontal orientation.
B) Lateral branch roots fully embedded in soil would grow randomly upward and downward.
C) Lateral branch shoots would grow more horizontally and have less of a tendency to turn upward.
D) Only shoots would be affected.
E) Roots breaking the soil surface would grow upward.