* {
    box-sizing: border-box;
}

.container {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
}

.choice {
    position: relative;
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    flex-basis: 0;
    flex-grow: 1;
    max-width: 100%;
    display: block;
}

img {
    display: block;
    margin-left: auto;
    margin-right: auto;
    max-width: 100px;
  }