video1.0<iframe src="https://www.loom.com/embed/b731f02077d145438409cbc1d3b344ed" frameborder="0" width="1280" height="960" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>9601280Loomhttps://www.loom.com9601280https://cdn.loom.com/sessions/thumbnails/b731f02077d145438409cbc1d3b344ed-00001.jpg91p: Which choice most effectively introduces the paragraph? a: A) NO CHANGE; B) constructed of concrete and steel.; C) inefficient for developers to build.; D) used for residential and business purposes.