Z is. Asphalt begins to soften, if it is heated above +30, at noon under the sun it is quite possible.

Certificate of road engineer. Upper asphalt coating in Moscow and MO is made on bitumen BND 40/60. Its softening temperature is 51 degrees (agreed when heated in the sun is quite possible). Stretch at 25 degrees at least 40 cm (until the moment of rupture).
Comrade is right.