I’m 1979, China passed its “One Child Policy” mainly to?

Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? a. reflection across the line y = x b. rotation 180° clockwise about the origin followed by a reflection across the line y = -x c. reflection across the x-axis followed by a reflection across the y-axis d. reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin e. reflection across the y-axis followed by a rotation 90° clockwise about the origin

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

What is one early technological advance that shaped culture? a the use of fire b the discovery of arable land c family units. d migration