Why is it appropriate to give Line Leaders privileged access to the thinking behind a...

Comprehensive and Detailed In-Depth Explanation:

Line Leaders, as frontline managers, play a critical role in implementing change locally, according to the APMG Change Management Foundation. Option D ("They may block change if not fully engaged") is correct because Line Leaders can resist or undermine change if they don’t understand or buy into its rationale. Providing them privileged access to the "why" behind the change ensures alignment, reduces resistance, and equips them to support their teams effectively. Options A and B overstate their formal authority, and Option C contradicts the targeted engagement strategy for key roles.