Mixing baking soda with vinegar causes a chemical change. What is the evidence that chemical energy has been released during this process? The color of the mixture looks white.
The baking soda and the vinegar disappear.
The vinegar and baking soda form a mixture.
The temperature of the mixture changes.

i think that the answer is c

it was spontaneous.

"ain't i a woman? " is the name given to a speech, delivered extemporaneously, by sojourner truth, (1797–1883), born into slavery in new york state.sojourner truth' delivered her famous speech "ain't i a woman? " (which did not have a title at that moment) was given without any previous preparation. her dissertation took place at the women's convention in akron, ohio, in 1851.