To What Did Kent Flannery (1969)refer with the Term Broad-Spectrum

To what did Kent Flannery (1969) refer with the term broad-spectrum revolution?

A) the period in which Asia became the only place in the world with communities leading a sedentary life and engaging in food and animal domestication
B) the period in which the first large states began to grow,although there was nothing actually "revolutionary" about it because this process occurred very gradually
C) the period in which a wider range of tools was being fabricated,for both utilitarian and ritualistic purposes
D) the period beginning around 15,000 B.P.in the Middle East and 12,000 B.P.in Europe,during which a wider range of plant and animal life was hunted,gathered,collected,caught,and fished
E) the period between 20,000 B.P.and 10,000 B.P.when anatomically modern humans colonized the entire world,made possible by a smarter utilization of a wider range of environments