Step 1
Adjacent angles are angles that have a common side, a common vertex, and do not overlap.
Step 2
Conclude based on step 1
Therefore
[tex]\angle E\text{ +}\angle F=43^0[/tex][tex]\begin{gathered} \angle E\text{ = 28.3} \\ So\text{ that after substitution} \\ \angle F=43-28.3=14.7^O \end{gathered}[/tex]
Hence option A is right.
