Which of the following activities create positive externalities? Group of answer choices An excavation firm pollutes a local stream with acid rock drainage. A student talks on her cell phone during class. Late-night road construction begins on a new bridge. As a consequence, traffic is rerouted past your house while the construction takes place. You and your friends volunteer to plant wildflowers along the local highway.

Acontractor was awarded a purchase order for commercial items for $1.5 million under the authority of far subpart 13.5. the purchase order was issued in november 2010 and containedall applicable clauses that were current as of the date of the purchase order. under the purchase order, the contractor is required to comply with a small business subcontracting plan that contains all of the required elements. which of the following is true? a.the contractor must submit a standard form 294, subcontracting report for individual contracts. b.the contractor must submit an individual subcontracting report through the electronic subcontracting reporting system (esrs). c.the contractor may submit either an sf 294 or report its subcontracting through esrs. d.the contractor is not required to submit any subcontracting reports.