All of the following advantages are conferred by obsidian except: ...

[mynx]

All of the following advantages are conferred by obsidian except:
 
  a. it allows a surgeon greater control over cutting
 b. it can be made sharper than conventional sources for blades
  c. it is harder than conventional sources for blades
 d. it is always very difficult to obtain

Question 2

All of the following are basic changes that mark the transition from Neolithic village life to life in the first urban centers except:
 
  a. agricultural innovation.
  b. social stratification.
  c. central government.
  d. diversification of labor.
  e. expansion of religious centers.

[parker125]

Answer to Question 1

d

Answer to Question 2

e

[mynx]

Thanks for the timely response, appreciate it

[xiazhe]

Gracias!