Final answer:
The most important task for a new cybersecurity analyst is identifying and mitigating cybersecurity threats.
Step-by-step explanation:
The most important task for a new cybersecurity analyst to prioritize in their first job is (d) identifying and mitigating cybersecurity threats. This is crucial because a cybersecurity analyst plays a significant role in protecting an organization's systems and data from various cyber threats. By focusing on identifying and mitigating these threats, they can help prevent any potential breaches or attacks.
While understanding the company's security policies and procedures (a) is also important, it is essential to address immediate threats first. Learning about the company's network infrastructure and systems (b) is valuable for understanding the specific technical aspects, but it is not the highest priority task for a new cybersecurity analyst.
Developing expertise in a specific cybersecurity tool or technology (c) can be beneficial in the long term, but it should not take precedence over identifying and mitigating threats.