If a Pharmaceutical Company Wished to Design a Drug to Maintain

If a pharmaceutical company wished to design a drug to maintain low blood sugar levels, one approach might be to

A) design a compound that mimics epinephrine and can bind to the epinephrine receptor.
B) design a compound that stimulates cAMP production in liver cells.
C) design a compound to stimulate G protein activity in liver cells.
D) design a compound that increases phosphodiesterase activity.
E) All of the above are possible approaches.