Select the sentence with correctly placed commas. In ancient times, silverpoint, a traditional drawing technique, was employed by scribes, and consisted of dragging a piece of metal across a surface lined with gesso. In ancient times silverpoint, a traditional drawing technique was employed by scribes, and consisted of dragging a piece of metal across a surface lined with gesso. In ancient times, silverpoint, a traditional drawing technique, was employed by scribes and consisted of dragging a piece of metal across a surface lined with gesso. In ancient times silverpoint a traditional drawing technique was employed by scribes and consisted of dragging a piece of metal across a surface lined with gesso. In ancient times, silverpoint, a traditional drawing technique was employed by scribes, and consisted of dragging a piece of metal across a surface lined with gesso.