For a short$-$run cost function which $of$ the following statements $is(are)$ true?

The marginal cost function intersects the average variable cost function where the average variable cost function $is$ a minimum.

and

The marginal cost function intersects the average total cost function where the average total cost function $is$ a minimum.

The marginal cost function intersects the average total cost function where the average total cost function $is$ a minimum.

The marginal cost function intersects the average fixed cost function where the average variable cost function $is$ a minimum.

The average fixed cost function $is$ monotonically increasing.

The marginal cost function intersects the average variable cost function where the average variable cost function $is$ a minimum.