This question focuses on identifying factors that influence housing prices. The correct answer is 'C. High employment rates in the tech industry' because employment in a strong industry can lead to increased demand for housing, driving prices up. 'A. Decline in the number of homes for sale' could also increase prices due to supply constraints, but there's no information given about supply. 'B. Increase in the city's population' might increase demand, but it's not specified in the text. 'D. Reduction in real estate taxes' could make buying a home more attractive but is not mentioned as a factor.