Step 1: Understanding the Question:
The task is to find the synonym for the word "perspicacious" from the given options. A synonym is a word that has the same or nearly the same meaning as another word.
Step 2: Detailed Explanation:
The word perspicacious means having a ready insight into and understanding of things; it implies keenness of observation and discernment.
Now let's analyze the options:
superficial: Means existing or occurring at or on the surface; not thorough, deep, or complete. This is an antonym.
ambiguous: Means open to more than one interpretation; having a double meaning or unclear. This is unrelated.
astute: Means having or showing an ability to accurately assess situations or people and turn this to one's advantage. This is very close in meaning to perspicacious, as both imply sharp insight and understanding.
obstinate: Means stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so. This is unrelated.
Step 3: Final Answer:
Based on the meanings, "astute" is the best synonym for "perspicacious" as both words describe someone who is sharp, insightful, and mentally keen. The CEO's analysis was sharp and insightful, which is what "astute" means.