SCM development strategy for Integration stream where only specific feature will be selected for release.

I am using RTC 6.0.6 version for SCM development, Considering the development scenario for three streams, stream A stream B for development and stream c as Integration stream, Once the development start I am creating the repository workspace from Stream c as baseline of code. In repository workspace i will develop the feature1 and will push it to stream A and create the basline named as feture1_baseline. After that i will have another feature2 for development so for that again i will take baseline from preprod and start the develoment of feture 2. After development finish will push the feature 2 code in stream A and create the baseline named as feature2_baseline. Same process will do for Feture 3 development and create feature3_baseline. s Now In my Stream A i have three baselines for feature1, 2 and 3 but with seperate code function. so now on stream c i want pass the devlopment code of feature 1 and feature 2 only as combine. want to exclude the feature 3 development so what will the best approach to for this type of development. Same case will happen for Stream B development where on stream c as Integration I will pick only the specific feature for development. Please suggest the best approches for doing the Integration of such fetures which are on demand.