The management team of a large company is interested in determining the views of the company's employees on extending the flexible work arrangements (e.g., working from home) after the Covid-19 crisis is over. The company employs 1000 people and selected a random sample of 100 employees by selecting every tenth employee in their database. Which of the following best describes this sampling method?

Cluster

Simple random

None of these choices is correct.

Systematic

Stratified