Please assist with the following question

For a perfectly competitive firm, if Price O firm will take a loss. firm will have zero economic profits. O firm will increase output. O marginal revenue will decrease. 2 of 25 All of the following are characteristics of perfect competition EXCEPT O homogenous products. O each firm is a price taker. O product differentiation. O a lack of barriers. 3 of 25 The short-run is the period in which while the long-run is the period in which the firm uses its current resources, the firm considers other resources O at least one input is fixed; all inputs are variable O the firm is concerned with current market conditions, the firm is concerned with future market conditions O the firm cannot produce any more, the firm can expand production 4 of 25