The Gutai manifesto proclaimed an end of performance art. ...

[shenderson6]

The Gutai manifesto proclaimed an end of
 
  performance art.
   happenings.
   the theater of life.
   traditional art making.

Question 2

Niki de Saint Phalle's works, which she killed with nails, dirt, darts, and other objects, most closely show the continuing influence of
 
  Surrealism.
   Dada.
   Post-Impressionism.
   Futurism.

[blazinlyss]

Answer to Question 1

traditional art making.

Answer to Question 2

Dada.