VEVOR NM-B Wire, 10AWG/2C Non-Mettalic Residential Indoor Electrical Wire with Ground, PVC Sheathed High-Purity Copper Core Cable, for Outlets, Switches, Other Loads & Lighting Wiring Projects(50 ft)

Are the conductors solid or stranded. The pictures show a solid ground wire and stranded conductor wires. NMB wire usually has all 3 wires as solid.

I am on the page for VEVOR NM-B Wire, 10AWG/2C Non-Mettalic Residential Indoor Electrical Wire with Ground, 50 feet and asked if the wire is solid or stranded because the picture shows stranded wire. The reply said there is no wire in flooring. I did not ask about flooring.

Is this wire certified to be used in the United States. I will only order it if it is been okay by the United States for use