First, the popularity of CG displays isn’t lamented—the first paragraph is squarely focused on the benefits. Second, corrective actions are recommended, but they’re meant to ensure its proper use, not to stem (i.e., reduce or eliminate) its use.

"Endorsed" might be a bit strong—the author’s just acknowledging its advantages in P1. More critically, (B) completely ignores the problem presented in P2 and the solution presented in P3. The problem and solution are central to the passage.

CG displays are first presented as advantageous in P1 before also being presented as problematic in P2. And the author doesn’t discuss any alternative uses for CG displays; he only talks about its use in trials.

This is a complete and accurate low-res summary of this Problem-Solution passage. In P1, CG displays are introduced as useful. In P2, problems are identified. And in P3, recommendations for preventing those problems are offered.

There were no recommendations for promoting the widespread use of CG displays. The author doesn’t show any interest in how widely used CG displays are or could be. Rather, he makes recommendations for promoting their proper use.