How does Amazon use its Alexa ecosystem to improve its products and services?

a$.$ By embedding Alexa in low$-$end devices like the Echo Dot.

b$.$ By gathering consumer behavior data from Alexa touchpoints.

c$.$ By frequently updating the Alexa$-$enabled devices.

d$.$ By offering telepresence services through Alexa.

e$.$ By providing Alexa with a multitude of voice$-$recognition options.