What role have ethnic minority groups played in Texas's population growth in recent years?
a. Ethnic minority groups have had minimal impact on Texas's population growth in recent years.
b. Ethnic minority groups have contributed significantly to Texas's population growth in recent years.
c. Ethnic minority groups have had a fluctuating but overall positive impact on Texas's population growth in recent years.
d. Ethnic minority groups have actually slowed down Texas's population growth in recent years.