Amit is preparing a job advertisement for a new tech developer for his company. He is looking for someone with a lot of energy, so he included this wording in the ad: $$Must be under $30$ and proficient in emerging technology.$$ Amit shared the job ad with a colleague for proofreading, and his colleague pointed out that Amit was demonstrating $\_\_\_\_\_\_\_\_.$

gender bias

dynamic delivery

passive voice

age bias